Constant Py_TPFLAGS_HAVE_VECTORCALL

pub const Py_TPFLAGS_HAVE_VECTORCALL: c_ulong = _; // 2_048u64

Available on Py_3_12, or Py_3_8 and non-Py_LIMITED_API only.

Set if the type implements the vectorcall protocol (PEP 590)